CDCM1804RGET

Overview

The CDCM1804RGET is a clock buffer and driver manufactured by Texas Instruments, designed for high-frequency signal distribution. It operates within a supply voltage range of 3V to 3.6V and supports a maximum frequency of 800 MHz. The device features differential inputs and outputs, accommodating various input standards including CML, HSTL, LVDS, LVPECL, LVTTL, SSTL-2, and VML. Outputs are available in LVCMOS and LVPECL formats. Packaged in a 24-VQFN (4x4) with an exposed pad, it functions across an operating temperature range of -40°C to 85°C.

Feature Summary

• Supports 1:3 fanout ratio with differential input/output capabilities
• Maximum operating frequency of 800 MHz
• Compatible with multiple input standards: CML, HSTL, LVDS, LVPECL, LVTTL, SSTL-2, VML
• Operates on a single 3V to 3.6V power supply

Applications

• High-speed data communication systems requiring clock distribution
• Networking equipment utilizing LVDS or LVPECL interfaces
• Test and measurement instruments needing precise clock buffering

Procurement Notes

Verify the specific package variant (Tape & Reel, Cut Tape, or Bulk) required for the manufacturing process. Confirm that the 24-VQFN footprint matches the PCB layout design. Ensure the system power supply remains strictly within the 3V to 3.6V range to maintain operational integrity and signal quality at frequencies up to 800 MHz.

Selection Notes

Select this component when a 1:3 fanout buffer is needed for high-speed differential signals. It is suitable for designs requiring compatibility with diverse logic families such as LVDS, LVPECL, or CML. Consider the 24-VQFN package constraints and thermal dissipation requirements associated with the exposed pad design for surface mount assembly.

Part Context

This part belongs to the CDCM1804 series of clock buffers from Texas Instruments. It serves as a distribution element in clock networks, converting and amplifying input clock signals to drive multiple downstream loads while maintaining low skew and jitter characteristics typical of high-performance clock drivers.

Replacement Considerations

Check for direct pin-to-pin replacements within the same family or newer generations from Texas Instruments. Verify that any substitute maintains the 800 MHz frequency limit and compatible input/output voltage levels.